Double angle seal forming lubricant film

Details Double angle seal forming lubricant film Double angle seal forming lubricant film

1982-11-24

1984-05-15

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277115, 277121, 277165, 277171, 277 1, 277190, 277237A, 277DIG6, F16J 1524, F16J 1540, F16J 1544

Patent

active

044484240

ABSTRACT:
A lubricated piston rod seal which inhibits gas leaking from a high pressure chamber on one side of the seal to a low pressure chamber on the other side of the seal. A liquid is supplied to the surface of the piston rod on the low pressure side of the seal. This liquid acts as lubricant for the seal and provides cooling for the rod. The seal, which can be a plastic, elastomer or other material with low elastic modulus, is designed to positively pump lubricant through the piston rod/seal interface in both directions when the piston rod is reciprocating. The capacity of the seal to pump lubricant from the low pressure side to the high pressure side is less than its capacity to pump lubricant from the high pressure side to the low pressure side which ensures that there is zero net flow of lubricant to the high pressure side of the seal. The film of lubricant between the seal and the rod minimizes any sliding contact and prevents the leakage of gas. Under static conditions gas leakage is prevented by direct contact between the seal and the rod.

REFERENCES:
patent: 648675 (1900-05-01), Tripold
patent: 3214179 (1965-10-01), Dega
patent: 4173157 (1979-11-01), Miller et al.
patent: 4190259 (1980-02-01), Zitting

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